- County
- LINN
- Bid Order
- 158
- Enriched
- Yes
- Projects
- HSIPX-100-1(129)--3L-57
- Proposal Id
- 57-1001-129
- Letting Date
- Oct 20, 2026
- List Url Hint
- ia.iowadot.gov/contracts/biddocuments
- Package Text
- 9/8/2026 12:56 PM
CONTRACTS AND SPECIFICATIONS BUREAU
Proposal
Proposal ID: 57-1001-129 Letting Date: October 20, 2026
Call Order: 158
Proposal Work Type: HMA PAVED SHOULDER - NEW
DBE Goal: 0.0%
Contracting Authority: IOWA DEPARTMENT OF TRANSPORTATION
Proposal Guaranty: $100,000.00
This proposal includes the following project(s):
Project Number: HSIPX-100-1(129)--3L-57 County: LINN
Project Work Type: HMA PAVED SHOULDER - NEW Route: IOWA 100
Location: IA 922 to IA 151
Road System: PRIMARY ROAD (on NHS)
Federal Aid - Wages: Federal Aid - Predetermined Wages are in Effect
Contracts and Specifications Bureau
9/8/2026 12:56 PM
Contract Time
Proposal ID: 57-1001-129 Call Order: 158 Letting Date: October 20, 2026
Site ID Site Details Liquidated
Damages
00 Late Start Date 06/07/2027 45 WORK DAYS $1,000.00
Overall Site.
01 No Start Date Specified 15 WORK DAYS $1,000.00
Stage 1. 44th St. closure.
02 No Start Date Specified 10 WORK DAYS $1,000.00
Stage 2 and Stage 3. Munier Rd closure.
(*) - Indicates Cost Plus Time Site. See Schedule of Items for Cost Per Unit
Contracts and Specifications Bureau
9/8/2026 12:56 PM
Proposal ID: 57-1001-129 Call Order: 158 Letting Date: October 20, 2026
Notes
Notes :
***Work Restriction***
Work at 44th Street (Site 01) shall be completed prior to closure of median opening at Munier (Site 02).
Contracts and Specifications Bureau
9/8/2026 12:56 PM
Proposal Specifications List
Proposal ID: 57-1001-129 Call Order: 158 Letting Date: October 20, 2026
Note Description
001.2023 *** STANDARD SPECIFICATIONS -- SERIES 2023 ***
The Iowa Department of Transportation STANDARD SPECIFICATIONS FOR
HIGHWAY AND BRIDGE CONSTRUCTION, SERIES 2023, plus applicable General
Supplemental Specifications, Developmental Specifications, Supplemental
Specifications AND Special Provisions shall apply to construction work on this contract.
Contracts and Specifications Bureau
9/8/2026 12:56 PM
Proposal Specifications List
Proposal ID: 57-1001-129 Call Order: 158 Letting Date: October 20, 2026
Note Description
005.1107.02 *** Revisions to Article 1107.02 ***
Article 1107.02, Insurance, is amended by the following modifications and additions.
This proposal note becomes null and void January 1, 2027.
A. It shall be the Contractor's responsibility to have liability insurance covering all
of the construction operations incident to contract completion and the Contractor must
have on file with the Contracting Authority a current "Certificate of Insurance" prior to
award of contract. The certificate shall identify the insurance company firm name and
address, Contractor firm name, policy period, type of policy, limits of coverage, and
scope of work covered (single contract or statewide). This requirement shall apply with
equal force, whether the work is performed by persons employed directly by the
Contractor including a subcontractor, persons employed by a subcontractor, or by an
independent contractor.
B. In addition to the above, the Contracting Authority shall be included as an
insured party, or a separate owner's protective policy shall be filed showing the
Contracting Authority as an insured party.
C. The liability insurance shall be written by an insurance company (or
companies) qualified to do business in Iowa. For independent contractors engaged
solely in the transportation of materials, the minimum coverage provided by such
insurance shall be not less than that required by Chapter 325A, Code of Iowa, for such
truck operators or contract carriers as defined therein. For all other contractors,
subcontractors, independent contractors, and the Contracting Authority, the minimum
coverage by such insurance shall be as follows:
General Liability, Including: BODILY INJURY
Independent Contractors $500,000 Each Occurrence
Contractual Liability, $500,000 Aggregate
Products and Completed PROPERTY DAMAGE
Operations $250,000 Each Occurrence
$250,000 Aggregate
or
BODILY INJURY AND PROPERTY DAMAGE
- COMBINED SINGLE LIMIT*
$750,000 Each Occurrence
$750,000 Aggregate
*A comprehensive Catastrophe Liability Policy (Umbrella) can be used to aid in
achieving the minimum required limits.
Contracts and Specifications Bureau
9/8/2026 12:56 PM
Proposal Specifications List
Proposal ID: 57-1001-129 Call Order: 158 Letting Date: October 20, 2026
Note Description
*A comprehensive Catastrophe Liability Policy (Umbrella) can be used to aid in
achieving the minimum required limits.
D. Failure on the part of the Contractor to comply with the requirements of this
article will be considered sufficient cause to suspend the work, withhold estimates, and
to deny the Contractor from receiving further contract awards, as provided in Article
1103.01.
410.11 *** STORM WATER POLLUTION PREVENTION PLAN ***
A Storm Water Pollution Prevention Plan has been developed by the Contracting
Authority for one or more projects on this contract. See the project plans (or other
contract document) for specific Storm Water Pollution Prevention Plan details.
500.01 *** WINTER WORK ***
The free time allowed between November 15 and April 1 will not be permitted on this
project. The Contractor shall work during the winter on all working days as defined in
Article 1101.03 'Working Day'.
DS-23083 DEVELOPMENTAL SPECIFICATIONS FOR FIBER REINFORCEMENT FOR
STRUCTURAL CONCRETE
DS-23088 DEVELOPMENTAL SPECIFICATIONS FOR DIAMOND GRINDING RUMBLE STRIPS
FHWA-1273.09 FHWA-1273: REQUIRED CONTRACT PROVISIONS FEDERAL-AID
CONSTRUCTION CONTRACTS -- REVISED OCTOBER 23, 2023
23 U.S.C. 133(i) requires application of Davis Bacon predetermined wages on certain
projects on roads functionally classified as a local road or a rural minor collector. This
supersedes the applicability described in FHWA-1273 Section IV.
GS-23007 GENERAL SUPPLEMENTAL SPECIFICATIONS FOR HIGHWAY AND BRIDGE
CONSTRUCTION, OCTOBER 20, 2026 RELEASE
Contracts and Specifications Bureau
9/8/2026 12:56 PM
Proposal Specifications List
Proposal ID: 57-1001-129 Call Order: 158 Letting Date: October 20, 2026
Note Description
IA26-28.4A PREDETERMINED WAGE RATE - GENERAL DECISION NUMBER IA20260028
FOR HEAVY AND HIGHWAY CONSTRUCTION -- STATEWIDE (EXCEPT SCOTT
COUNTY)
Note: The Contractor shall review the contract documents and
is responsible for identifying which zone(s), as defined
in the Predetermined Wage Rate specification, apply to
the work on the contract.
*** Additional Requirement ***
Contracts where the Department is the Contracting Authority:
The Prime Contractor and each approved Subcontractor shall submit certified payrolls
weekly to the Project Engineer. Each Contractor shall use the AASHTOWare Project
Civil Rights and Labor (AWP CRL) software to electronically submit Certified Payroll
Reports. The Contractor shall list the craft for each employee covered by the
Predetermined Wage Rates. The Prime Contractor shall review and approve each
Subcontractor’s payroll within AWP CRL.
Contracts where the Department is not the Contracting Authority:
The Prime Contractor shall submit certified payrolls for itself and each approved
Subcontractor weekly to the Project Engineer. The Contractor may use the Iowa D.O.T.
Certified Payroll form or other approved form. The Contractor shall list the craft for
each employee covered by the Predetermined Wage Rates. The Prime Contractor
shall sign each of the Subcontractor's payrolls to acknowledge the submittal of the
Certified Payroll.
Contracts and Specifications Bureau
9/8/2026 12:56 PM
Proposal Schedule of Items
Proposal ID: 57-1001-129 Call Order: 158 Letting Date: October 20, 2026
SECTION: 0001
ROADWAY ITEMS
Proposal
Line
Number
Item Number
Item Description
Item Quantity
and Units
Unit Price Bid Amount
Dollars Cents Dollars Cents
0010 2101-0850001 0.500
CLEARING AND GRUBBING ACRE _________._____ _________._____
0020 2102-2625000 4,585.000
EMBANKMENT-IN-PLACE CY _________._____ _________._____
0030 2102-2710070 852.000
EXCAVATION, CLASS 10, ROADWAY
AND BORROW
CY _________._____ _________._____
0040 2105-8425015 2,147.000
TOPSOIL, STRIP, SALVAGE AND
SPREAD
CY _________._____ _________._____
0050 2107-0875100 4,181.000
COMPACTION WITH MOISTURE
CONTROL
CY _________._____ _________._____
0060 2115-0100000 915.000
MODIFIED SUBBASE CY _________._____ _________._____
0070 2121-7425020 3,787.000
GRANULAR SHOULDERS, TYPE B TON _________._____ _________._____
0080 2122-5500090 276.000
PAVED SHOULDER, HOT MIX
ASPHALT MIXTURE, 9 IN.
SY _________._____ _________._____
0090 2213-2713300 2,398.000
EXCAVATION, CLASS 13, FOR
WIDENING
CY _________._____ _________._____
0100 2213-8200000 4,995.000
BASE WIDENING, HOT MIX ASPHALT
MIXTURE
TON _________._____ _________._____
0110 2301-1033100 2,662.000
STANDARD OR SLIP FORM
PORTLAND CEMENT CONCRETE
PAVEMENT, CLASS C, CLASS 3
DURABILITY, 10 IN.
SY _________._____ _________._____
Contracts and Specifications Bureau
9/8/2026 12:56 PM
Proposal Schedule of Items
Proposal ID: 57-1001-129 Call Order: 158 Letting Date: October 20, 2026
SECTION: 0001
ROADWAY ITEMS
Proposal
Line
Number
Item Number
Item Description
Item Quantity
and Units
Unit Price Bid Amount
Dollars Cents Dollars Cents
0120 2301-4875006 487.000
MEDIAN, P.C. CONCRETE, 6 IN. SY _________._____ _________._____
0130 2303-1033504 1,444.000
HOT MIX ASPHALT STANDARD
TRAFFIC, SURFACE COURSE, 1/2 IN.
MIX, FRICTION L-4
TON _________._____ _________._____
0140 2303-1258283 300.000
ASPHALT BINDER, PG 58-28S,
STANDARD TRAFFIC
TON _________._____ _________._____
0150 2303-7000610 5,635.000
PAYMENT ADJUSTMENT
INCENTIVE/DISINCENTIVE FOR HMA
MIXTURE LABORATORY VOIDS
(FORMULA - BY PAY FACTOR)
EACH 1.00000 5,635.00
0160 2303-7000620 5,635.000
PAYMENT ADJUSTMENT
INCENTIVE/DISINCENTIVE FOR HMA
MIXTURE FIELD VOIDS (FORMULA -
BY PAY FACTOR)
EACH 1.00000 5,635.00
0170 2401-6745910 2.000
REMOVAL OF SIGN EACH _________._____ _________._____
0180 2505-4008120 240.000
REMOVAL OF STEEL BEAM
GUARDRAIL
LF _________._____ _________._____
0190 2505-4008300 31.200
STEEL BEAM GUARDRAIL LF _________._____ _________._____
0200 2505-4008410 1.000
STEEL BEAM GUARDRAIL BARRIER
TRANSITION SECTION, BA-201
EACH _________._____ _________._____
0210 2505-4008420 1.000
STEEL BEAM GUARDRAIL BARRIER
TRANSITION SECTION, BA-221
EACH _________._____ _________._____
Contracts and Specifications Bureau
9/8/2026 12:56 PM
Proposal Schedule of Items
Proposal ID: 57-1001-129 Call Order: 158 Letting Date: October 20, 2026
SECTION: 0001
ROADWAY ITEMS
Proposal
Line
Number
Item Number
Item Description
Item Quantity
and Units
Unit Price Bid Amount
Dollars Cents Dollars Cents
0220 2505-4021010 2.000
STEEL BEAM GUARDRAIL END
ANCHOR, BOLTED
EACH _________._____ _________._____
0230 2505-4021720 1.000
STEEL BEAM GUARDRAIL TANGENT
END TERMINAL, BA-205
EACH _________._____ _________._____
0240 2505-4021722 1.000
STEEL BEAM GUARDRAIL TANGENT
END TERMINAL, BA-225
EACH _________._____ _________._____
0250 2510-6745850 1,479.000
REMOVAL OF PAVEMENT SY _________._____ _________._____
0260 2520-3350015 1.000
FIELD OFFICE EACH _________._____ _________._____
0270 2524-6765010 4.000
REMOVE AND REINSTALL SIGN AS
PER PLAN
EACH _________._____ _________._____
0280 2524-6765210 9.000
REMOVAL OF TYPE A SIGN
ASSEMBLY
EACH _________._____ _________._____
0290 2524-9276010 96.000
PERFORATED SQUARE STEEL TUBE
POSTS
LF _________._____ _________._____
0300 2524-9276027 8.000
PERFORATED SQUARE STEEL TUBE
POST ANCHOR, TRIANGULAR SLIP
BASE ASSEMBLY
EACH _________._____ _________._____
0310 2524-9290009 5.000
SIGN MOUNTING BRACKETS,
SPECIAL
EACH _________._____ _________._____
0320 2524-9325001 113.200
TYPE A SIGNS, SHEET ALUMINUM SF _________._____ _________._____
Contracts and Specifications Bureau
9/8/2026 12:56 PM
Proposal Schedule of Items
Proposal ID: 57-1001-129 Call Order: 158 Letting Date: October 20, 2026
SECTION: 0001
ROADWAY ITEMS
Proposal
Line
Number
Item Number
Item Description
Item Quantity
and Units
Unit Price Bid Amount
Dollars Cents Dollars Cents
0330 2526-8285020
CONSTRUCTION SURVEY, CONTROL
POINT SURVEY
LUMP SUM LUMP SUM _________._____
0340 2526-8285040
CONSTRUCTION SURVEY, LOCATION
SURVEY
LUMP SUM LUMP SUM _________._____
0350 2527-9263209 58.000
PAINTED PAVEMENT MARKINGS,
WATERBORNE OR SOLVENT-BASED
STA _________._____ _________._____
0360 2527-9270112 58.000
GROOVES CUT FOR PAVEMENT
MARKINGS
STA _________._____ _________._____
0370 2528-2518000 8.000
SAFETY CLOSURE EACH _________._____ _________._____
0380 2528-8445110
TRAFFIC CONTROL LUMP SUM LUMP SUM _________._____
0390 2528-9290050 80.000
PORTABLE DYNAMIC MESSAGE SIGN
(PDMS)
CDAY _________._____ _________._____
0400 2533-4980005
MOBILIZATION LUMP SUM LUMP SUM _________._____
0410 2548-0000110 388.000
ASPHALT EMULSION FOR FOG SEAL
(SHOULDER RUMBLE STRIPS)
GAL _________._____ _________._____
0420 2548-0000170 359.000
MILLED SHOULDER SINUSOIDAL
RUMBLE STRIPS, HMA SURFACE
STA _________._____ _________._____
0430 2548-0000260 27.000
DIAMOND GROUND SHOULDER
SINUSOIDAL RUMBLE STRIPS, PCC
SURFACE
STA _________._____ _________._____
Contracts and Specifications Bureau
9/8/2026 12:56 PM
Proposal Schedule of Items
Proposal ID: 57-1001-129 Call Order: 158 Letting Date: October 20, 2026
SECTION: 0001
ROADWAY ITEMS
Proposal
Line
Number
Item Number
Item Description
Item Quantity
and Units
Unit Price Bid Amount
Dollars Cents Dollars Cents
0440 2601-2634100 5.500
MULCHING ACRE _________._____ _________._____
0450 2601-2636043 3.000
SEEDING AND FERTILIZING (RURAL) ACRE _________._____ _________._____
0460 2601-2642100 3.000
STABILIZING CROP - SEEDING AND
FERTILIZING
ACRE _________._____ _________._____
0470 2602-0000020 2,700.000
SILT FENCE LF _________._____ _________._____
0480 2602-0000030 1,500.000
SILT FENCE FOR DITCH CHECKS LF _________._____ _________._____
0490 2602-0000071 4,200.000
REMOVAL OF SILT FENCE OR SILT
FENCE FOR DITCH CHECKS
LF _________._____ _________._____
0500 2602-0000101 4,200.000
MAINTENANCE OF SILT FENCE OR
SILT FENCE FOR DITCH CHECK
LF _________._____ _________._____
0510 2602-0000320 2,935.000
PERIMETER AND SLOPE SEDIMENT
CONTROL DEVICE, 20 IN. DIA.
LF _________._____ _________._____
0520 2602-0000351 2,935.000
REMOVAL OF PERIMETER AND
SLOPE OR DITCH CHECK SEDIMENT
CONTROL DEVICE
LF _________._____ _________._____
0530 2602-0010010 2.000
MOBILIZATIONS, EROSION CONTROL EACH 600.00000 1,200.00
0540 2602-0010020 2.000
MOBILIZATIONS, EMERGENCY
EROSION CONTROL
EACH 1,200.00000 2,400.00
Section: 0001 Total: _________._____
Total Bid: _________._____
DS- 23083
(Replaces DS-23076)
DEVELOPMENTAL SPECIFICATIONS
FOR
FIBER REINFORCEMENT FOR STRUCTURAL CONCRETE
Effective Date
January 21, 2026
THE STANDARD SPECIFICATIONS, SERIES 2023, ARE AMENDED BY THE FOLLOWING
MODIFICATIONS AND ADDITIONS. THESE ARE DEVELOPMENTAL SPECIFICATIONS AND THEY
SHALL PREVAIL OVER THOSE PUBLISHED IN THE STANDARD SPECIFICATIONS.
23083.01 DESCRIPTION.
A. Fiber reinforcement shall be incorporated in the locations and quantities of concrete designated in
the contract documents. Work types for structures which may be designated for incorporation of
fiber reinforcement could include bridge substructures, bridge decks, bridge deck overlays,
structural repairs, or other applications.
B. Use approved products and proportions of synthetic macro fiber and incorporate into the concrete
mix in accordance with these developmental specifications. The purpose of the fiber
reinforcement is to mitigate risk and effects of cracking and improve the durability of the concrete.
C. Apply Section 2403 of the Standard Specifications, subject to the modifications herein. When
relevant to the work type, also apply Sections 2412 or 2413 of the Standard Specifications,
subject to the modifications herein.
D. The contract documents may designate incorporation of fiber reinforcement into concrete mixes
governed under other developmental specifications. Examples could include High Performance
Concrete for Structures, or Structural Concrete (4500 psi or Greater). Meet the provisions of
applied developmental specifications concurrently. The provisions for concrete slump specified in
DS-23083.02, A, 3, shall prevail over provisions for concrete slump specified in other applied
developmental specifications.
23083.02 MATERIALS.
A. General.
1. Fibers shall be incorporated as an admixture to the concrete mix. Adjustments to the base
volumetric proportions of mix constituents are not required to compensate for the volumetric
proportion of fiber admixture.
2. Select a concrete mix which satisfies all applicable requirements and achieves appropriate
workability upon incorporation of fibers at the required dosage rate.
DS-23083, Page 2 of 5
3. Material properties of the fiber reinforced concrete (FRC) shall comply with the material
properties for concrete specified elsewhere in the contract documents, except the following
relaxations are permissible for FRC slump:
a. Bridge Decks.
When mid-range water reducer is used with Class C or Class HPC-D mix, target slump
may be increased to 5 inches, allowing a maximum of 6 inches as a tolerance.
Commence testing for slump within 0 to 4 minutes after the FRC is discharged.
b. Bridge Deck Overlays.
When mid-range water reducer is used with Class HPC-O mix, target slump may be
increased to 5 inches, allowing a maximum of 6 inches as a tolerance. Commence
testing for slump within 0 to 4 minutes after the FRC is discharged.
B. Fiber.
1. General.
Fiber reinforcement shall consist of macro fibers.
2. Macro Fiber.
a. Use product approved in accordance with Materials I.M. 491.27 Appendix B.
b. Dose macro fiber at a minimum rate of 4 pounds per cubic yard of concrete.
C. Documentation and Acceptance of Fiber Reinforced Concrete.
1. FRC shall comply with ASTM C1116, Type III. Furnish documentary evidence by the fiber
manufacturer demonstrating satisfactory performance history and compliance with ASTM
C1116, Type III for fiber product(s) used.
2. A trial batch and test placement will be required in accordance with DS-23083.03, A.
Acceptance of the FRC mix shall be contingent on successful completion of the trial batch and
test placement. At a minimum, the trial batch and test placement must demonstrate all the
following:
• Compliance with the contract documents and specified material properties.
• Acceptable workability.
• Batching and finishing processes representative of the proposed means and methods of
construction for production work.
• No detrimental effects associated with mix inconsistency, mix segregation, bleeding, or
balling of fibers.
23083.03 CONSTRUCTION.
A. Trial Batch and Test Placement.
1. General.
a. Provide the Engineer notice, mix proportions, and scheduled date at least 7 calendar days
prior to trial batch and test placement. Do not proceed with trial batch and test placement
without authorization of the Engineer.
b. Conduct trial batch and test placement at least 7 calendar days prior to planned
placement of production FRC.
c. Do not place production FRC until the trial batch and test placement have been accepted
by the Engineer. Trial batches or test placements which fail to meet acceptance criteria
must be repeated at no additional cost to the Contracting Authority, following appropriate
material and/or procedure modifications by the Contractor.
d. After acceptance of the trial batch and test placement, any contractor-initiated changes to
the mix design, fiber product or dosage, mix batching process, and/or methods of
installation shall constitute basis for requiring a new trial batch and test placement at no
additional cost to the Contracting Authority.
DS-23083, Page 3 of 5
e. The Engineer may waive the trial batch and test placement on the basis of past
successful placement of the same combination of mix design, fiber product and dosage,
mix batching process (including key personnel), and installation process (including key
personnel).
2. Trial Batch.
a. Identify dedicated batching personnel for FRC.
b. Establish and demonstrate the sequence of constituent material introduction during the
trial batch. Ensure the fiber manufacturer’s technical representative is available for advice
and guidance regarding fiber inclusion into the mix, as needed.
c. Batch the trial batch concrete for slump within 1 inch of the maximum slump permitted, air
content of 6% +/- 1% intended target for the production placement ± 2%, and w/c ratio
typical of the production FRC to be placed. Include any other admixtures proposed for
use in the production FRC, including but not limited to water reducers, viscosity modifiers
and set retarders as applicable, at their respective intended production dosage rates.
d. Sample and test the trial batch placement for the following:
• Materials I.M. 340 – Unit Weight of Plastic Concrete.
• Materials I.M. 318 – Air Content of Plastic Concrete.
• Materials I.M. 317 – Slump of Plastic Concrete
• Visual Stability of Plastic Concrete – Following slump test performed in accordance
with Materials I.M. 317, leave slumped concrete undisturbed on the test board for 3
minutes and observe for mortar ring or bleed water at the base of the concrete.
Report presence, description, and size of any mortar ring and/or bleed water halo.
e. Trial batch volume shall be in accordance with the following:
• Bridge Decks and Deck Overlays: 6 cubic yards, minimum.
• Non-Deck Applications; 3 cubic yards, minimum.
3. Test Placement.
a. General.
1) Utilize the trial batch concrete to conduct a test placement. Subject to the
requirements herein, the test placement may not require use of the full volume of trial
batch concrete.
2) Test placement shall be made within side/edge forms, on sufficiently rigid subbase, to
allow representative demonstration of the placement and finishing methods proposed
for production work. Use a durable, impermeable separation barrier between the
subbase and test placement.
3) Place, consolidate and finish the concrete within the test placement using methods
that are representative of the methods to be used with the production concrete. For
production methods deemed impractical to duplicate during the test pour (e.g. pump
placement, self-propelled machine finishing), substitute methods may be used
subject to the Engineer’s approval, provided the substitute methods allow full
evaluation of any/all mix properties that may affect the actual production methods.
Evaluate workability, finishability, and general suitability of the mix for production use.
4) Following completion of the test placement, deposit any remaining trial batch
concrete to an open container or other accessible location to allow further inspection
for potential mix inconsistency, mix segregation, bleeding, balling of fibers, or other
detrimental properties. Do not obscure or dispose of the trial batch or test placement
concrete until a minimum time of 2 hours has elapsed after completion of the test
placement, or until authorized by the Engineer, whichever comes first.
b. Test Placement for Bridge Decks and Deck Overlays.
1) Simulate the general placement conditions for production concrete. Conduct the test
placement in open air, during weather generally consistent with the anticipated
conditions during production placement.
2) Following trial batching, suspend the test placement for a period of time
approximately equal to the anticipated delivery time for production concrete. During
this suspension, maintain the concrete in a state of agitation generally representative
DS-23083, Page 4 of 5
of the anticipated delivery conditions for production concrete.
3) The area of the test placement shall be a minimum of 200 square feet. The least
horizontal dimension of the test placement shall be a minimum of 12 feet. Nominal
thickness of the test placement shall match as close as practical the nominal
thickness of the production concrete, except nominal thickness of the test placement
need not exceed 9 inches.
4) Test placements for bridge decks shall include reinforcing steel, oriented in two mats
of two layers each (longitudinal and transverse). Reinforcing steel shall have similar
size, spacing, top clearance to top mat and bottom clearance to bottom mat, as
shown in the contract documents for the production work. No reinforcing steel is
required for test placements for bridge deck overlays.
c. Test Placement for Non-Deck Applications.
Deposit the trial batch concrete into formwork with minimum dimensions of at least 3 feet
length by 3 feet width by 3 feet depth. Alternate formwork dimensions may be permitted,
subject to approval by the Engineer.
B. Production FRC.
1. Batching.
a. Production batching methods, equipment, sequence and personnel shall match those
used for the approved trial batch.
b. Introduce fibers into the mix in accordance with the fiber manufacturer’s
recommendations, unless otherwise approved by the Engineer.
c. Mix FRC in accordance with the Standard Specifications applicable for concrete, unless
otherwise approved by the Engineer.
d. Ensure uniform distribution and random orientation of fibers throughout the concrete.
2. Placing, Consolidating, Finishing and Curing.
Comply with provisions for concrete specified in Sections 2403, 2412, and 2413 of the
Standard Specifications, as well as other applied developmental specifications, as applicable
to the contract and the work type.
23083.04 METHOD OF MEASUREMENT.
A. Fiber Reinforcement for Structural Concrete.
1. Fiber reinforcement for structural concrete shall be measured and paid separate from the
concrete the fiber reinforcement is incorporated in. Measurement and payment for the
concrete shall be as specified elsewhere in the contract documents.
2. The unit of measurement for Fiber Reinforcement for Structural Concrete shall match the unit
of measurement applicable to the concrete the fiber reinforcement is incorporated in (ex. per
square yard or per cubic yard).
3. The quantity of Fiber Reinforcement for Structural Concrete will be the quantity shown in the
contract documents. The quantity of Fiber Reinforcement for Structural Concrete shall match
the quantity of the concrete the fiber reinforcement is incorporated in.
B. Trial Batch and Test Placement.
Trial Batch and Test Placement is a combined lump sum item.
23083.05 BASIS OF PAYMENT.
A. Fiber Reinforcement for Structural Concrete.
Payment with be at the contract unit price for Fiber Reinforcement for Structural Concrete.
Payment includes all cost of furnishing and incorporating fiber reinforcement, at the specified
DS-23083, Page 5 of 5
dosage rate, per applicable unit of concrete.
B. Trial Batch and Test Placement.
Payment will be at the lump sum contract unit price for the combined bid item Trial Batch and
Test Placement. Payment includes full compensation for Trial Batch and Test Placement,
inclusive of all materials and labor for furnishing, forming, placing, finishing, and evaluating.
DS-23088
(Replaces DS-23085)
DEVELOPMENTAL SPECIFICATIONS
FOR
DIAMOND GRINDING RUMBLE STRIPS
Effective Date
October 20, 2026
THE STANDARD SPECIFICATIONS, SERIES 2023, ARE AMENDED BY THE FOLLOWING
MODIFICATIONS AND ADDITIONS. THESE ARE DEVELOPMENTAL SPECIFICATIONS AND THEY
PREVAIL OVER THOSE PUBLISHED IN THE STANDARD SPECIFICATIONS.
23088.01 DESCRIPTION.
Provide equipment, furnish all necessary labor and materials, and perform all operations necessary for
diamond grinding standard or sinusoidal rumble strips in HMA or PCC surfaces. Diamond grind rumble
strips to the dimensions and spacing shown in the contract documents. Apply diluted asphalt emulsion to
the diamond ground shoulder rumble strips on HMA surfaces by means of a bituminous distributor.
23088.02 MATERIALS.
A. Use asphalt emulsion Grade CSS-1, CSS-1h, SS-1, or SS-1h meeting requirements of Section
4140 of the Standard Specifications.
B. Dilute the asphalt emulsion with water prior to application to the milled shoulder rumble strip. The
dilution rate is one part of asphalt emulsion to one part of water.
23088.03 CONSTRUCTION.
A. General.
1. Notify the Engineer if degraded areas are encountered that will not accommodate diamond
ground rumble strips. Skip those sections.
2. Allow PCC to cure for a minimum of 14 days prior to placing diamond ground rumble strips.
When maturity is used for opening, placement of diamond ground rumble strips may begin
when 350psi flexural strength is achieved.
B. Equipment.
1. Perform grinding using stacked diamond blades mounted on a self propelled machine that
has been designed for grinding PCC or HMA surfaces. Polycrystalline diamond (PCD) heads
are not considered an approved equal for stacked diamond blades. Ensure the equipment will
not cause strain or damage to the underlying pavement.
2. Do not use grinding equipment that causes excessive ravels, aggregate fractures, spalls, or
excessive disturbance of the transverse and/or longitudinal joints. The finished surface after
grinding the rumble strips should have a corduroy like texture.
3. For standard rumble strips use grinding equipment with a minimum effective head width
suitable for grinding the entire width of the rumble strip in one pass. For centerline rumble
strips use a grinding head equipped to grind the rumble strip on each side of the centerline in
one pass.
4. Select the blade type and number of blades per foot to provide proper surface texture based
on the material being ground, in particular, the coarse aggregate type.
C. Test Strip.
Demonstrate to the Engineer on an initial 500 foot test section that the equipment and method will
provide the desired diamond ground rumble strip and surface inside each depression without
damaging the adjacent pavement. If the desired results are not being provided, as determined by
the Engineer, provide different equipment or methods, or make necessary adjustments to provide
the desired results. If the initial 500 foot section results are unsatisfactory, repair or replace the
section as determined by the Engineer, at no additional cost to the Contracting Authority.
D. Grinding.
1. Grind shoulder rumble strips in a straight line, offset from the painted edge line as shown in
the contract documents. Do not deviate from that offset more than ±2 inches. Ensure the
depth of the rumble strips is as shown in the contract documents. The Engineer will randomly
check the alignment and depth.
2. Grind centerline rumble strips in a straight line, on the centerline joint as shown in the
contract documents. Do not deviate from that location more than ±1 inch. Ensure the depth of
the rumble strips is as shown in the contract documents. The Engineer will randomly check
the alignment and depth.
3. Continuously remove all slurry or residue resulting from the grinding operations. Do not
deposit on the slab or shoulder. Leave pavement and paved shoulders in a clean condition.
Ensure residue from grinding operations does not flow across lanes occupied by public traffic.
This residue may be spread on the foreslope or removed according to Article 1104.08 of the
Standard Specifications. When residue is deposited on the foreslope in areas where cable
guardrail is present, spread the residue in a manner that prevents it from collecting in the
sockets for the cable guardrail system. Take measures to prevent damage to vegetation
during spreading of residue. If damage occurs, repair at no cost to the Contracting
Authority. Do not allow discharge of slurry or residue into gutters, drainage facilities, or
bodies of water.
E. Asphalt Emulsion Fog Seal.
Per Article 2548.03, C of the Standard Specifications.
F. Limitations.
Do not disturb desirable grass areas and desirable trees outside the construction limits. Do not
park or service vehicles and equipment or use these areas for storage of materials. Obtain the
Engineer’s approval for storage, parking, and service areas.
23088.04 METHOD OF MEASUREMENT.
Measurement will be as follows:
A. Diamond Ground Shoulder Rumble Strips.
Stations shown in the contract documents for each type, measured along each edge of mainline
pavement. Unless stated otherwise in the contract documents, no deduction will be made for
gapped areas. The quantity will be adjusted for the length of degraded shoulders skipped, asDS-23088, Page 3 of 10
defined in Article DS-23088.03 of this specification. The quantity will be adjusted for test sections
that were deemed unsatisfactory.
B. Diamond Ground Centerline Rumble Strips.
Stations shown in the contract documents for each type, measured along the centerline of
mainline pavement. Unless stated otherwise in the contract documents, no deduction will be
made for gapped areas. The quantity will be adjusted for the length of degraded pavement
skipped, as defined in Article DS-23088.03 of this specification. The quantity will be adjusted for
test sections that were deemed unsatisfactory.
C. Asphalt Emulsion for Fog Seal (Shoulder Rumble Strips).
Gallons computed from field measurements of distributors or from tank cars or transport trucks as
provided in Article 4100.03 of the Standard Specifications. When quantities computed from field
measurements check within 1.0% of the billed gallons, payment will be based on billed gallons.
When quantities computed from field measurements differ from billed gallons by more than 1.0%,
payment will be based on the quantity from field measurements. From these quantities, any
amount used by the Contractor as fuel, left in cars, or otherwise not delivered to the road surface
will be deducted. The Engineer will advise the Contractor promptly, in writing, of quantities
deducted.
23088.05 BASIS OF PAYMENT.
Payment will be the contract unit price as follows:
A. Diamond Ground Shoulder Rumble Strips.
Per station for the type specified.
B. Diamond Ground Centerline Rumble Strips.
Per station for the type specified.
C. Asphalt Emulsion for Fog Seal (Shoulder Rumble Strips).
1. Per gallon for undiluted Asphalt Emulsion for Fog Seal (Shoulder Rumble Strips) that is
mixed and used on the project. Diluted asphalt emulsion that is delivered to the project site,
but not applied to the roadway surface will not be considered for payment.
2. Payment is full compensation for cleaning the shoulder surface, furnishing and applying
diluted asphalt emulsion, mixing water, and protecting the adjacent pavement and edge lines.DS-23088, Page 3 of 10
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- Package Files
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- 20OCT158\Prop\DS-23083.pdf
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- 20OCT158\Prop\DS-23088.pdf
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- 1371046
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- 20OCT158\Prop\estprop158.pdf
- Bytes
- 284500
- Package Pages
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Iowa Department of TransportationIssuing agency·Iowa·via a public procurement portal